What is boron?
Boron is a trace mineral with biological effects, though its essentiality is debated.
What are boron's benefits?
It seems to be able to reduce levels of inflammatory markers, and may reduce rheumatoid arthritis, osteoarthritis, and menstural cramps, though much more research is needed before we can be confident in these benefits. It also might have a small positive effect on LDL-cholesterol, but this is far from certain.
What are boron's side-effects and drawbacks?
It seems to be generally safe, though human research on its adverse effects is lacking, so smaller doses may be warranted.